Radio receiving system



May 8, 1928. 1,669,218

A. H. TAYLOR RADI 0 RECEIVING SYSTEM Filed F'b. 17. 1927 IN VEN TOR.

ATTORNEY Patented May 8, 1928.

UNITED STATES PATENT OFFICE.

ALBERT H. TAYLOR, OI W.ASHINGTON, DISTRICT 01 COLUMBIA, ASSIGNOB TO WIRED RADIO, INC., 01 NEW YORK, N. Y A. CORPORATION OF DELAWARE RADIO RECEIVING SYSTEM.-

Appllcation filed February 17, 1927. Serial No. 169,044.

My invention relates broadly to radio communication and more particularly to a system of radio reception for reducing the effects of fading of signals being received from a distant transmitter.

One of the objects of my invention is to provide a circuit arrangement for signal receiving systems wherein the effects of fading of signals transmitted from a distant station are substantially eliminated or reduced.

Another object of my invention is to pro vide a continuous wave receiving system which is arranged to compensate for the effects of fading of signaling energy from a distant transmitter.

My invention will be more fully understood from the specification hereinafter fol lowing by reference to the accompanyingdrawing which diagrammatically shows one embodiment of my invention as applied to a radio receiver system.

By my invention I provide a continuous wave receiving system wherein a plurality of antennae are coupled to independent receivers each adjusted to oscillate at different frequencies with their outputs connected to a binaural telephone circuit. As the signaling energy shifts from one frequency to another the multiple receiving circuits and binaural telephone circuits follow the signaling energy compensating for the effects of fading.

Referring to the drawing, I have shown separate antenna systems A, and A coupled to receivers R and R Each receiver may contain an autodyne circuit representedat 1 and 2 adjusted to different frequencies. The autodyne circuit R is constituted by tube 7 having grid, filament and plate electrodes in mutually coupled circuits. Similarly, the receivin circuit R is constituted by electron tube 8 lncluded in mutually coupled circuits. Receiver R is associated with antenna A through conductively connected circuit 9. The receiver R has its input circuit coupled with the antenna A through conductively coupled circuit 10.

A heterodyne 3 may be used for acting upon both R and R but in case a heterodyne is not used and autodyne reception is resorted to, R and R oscillate synchronously. This they will do very readily because the receivers R, andR are not located very far apart and the reaction between the two output of receiver R is connected to the left-hand ear phone 6. The ear is sensitive to the phase difference of the signaling energy and it manifests its sensitivity in binaural effect. In other words, the signal appears to come from a certain direction which continually shifts as the phase and intensity vary.

It is found that this method can be used in the reception of stations which have small variations in frequency which can be followed on the heterodyne. This system has been successfully operated at wave lengths as short as 20 meters with signals from relatively long distances, and it has been clearly demonstrated that two antennae separated approximately one-half wave length between their centers of electrical exposure give decidedly different fading. The average reception is clearly improved by using this method. It is true, that the signal appears to wander back and forth to the operator due to the binaural effect, but it does not appear to be particularly annoying and during fading it commonly resultsthat when the signal goes down in one car, it goes up in the other, thus permitting the operator to continue making copy.

While I have described my invention in one of its preferred embodiments, I desire that it be understood, that modifications may be made and that no limitations upon my invention are intended other than are imposed by the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States is as follows:

1. A radio receiving system comprising a. plurality of radio frequency energy collecting circuits, separate radio receiving circuits coupled with said radio frequency energy collecting, circuits and each adjusted to diiferent signaling frequencies, a circuit for generating high frequency oscillations, means for impressing said oscillations upon each of said radio receiving circuits, and a divided telephone circuit comprising a pair of independent telephone receivers, one of said receivers being connected with each of said separate radio receiving circuits for responding to signaling energy over a range of frequencies to which said radio receiving circuits are responsive.

2. A signal receiving system comprising a pair of independent radio frequency energy collecting circuits separate radio receiving circuits connected with each of said radio frequency energy collecting circuits and tuned to respond to different frequency ranges, a system for generating high frequency oscillations coupled to each of said radio receiving circuits, and a binaural tele phone circuit comprising a pair of telephone receivers, one of said telephone receivers being connected with each of said receiving circuits for responding to signaling energy over a band of frequencies corresponding to the total frequency range of each of said radio receiving circuits.

3. A-radio receiving system comprising a pair of independent antenna circuits, a radio receiving circuit coupled with each of said antenna circuits, said radio receiving circuits each being responsive to a separate range of frequencies, a generator of high frequency oscillations arranged to impress a predetermined frequency upon each of said receiving circuits, a binaural telephone circuit connected with said receiving circuit comprising a pair of telephone receivers, with one of said telephone receivers independently connected in each of said radio receiving circuits for indicating a response to signaling energy incident upon either of the said antenna systems over the aggregate range of frequencies to which said radio receiving circuits are adjusted.

4. A radio receiving system comprising a pair of independent antenna circuits, separate receiving circuits connected with said antenna circuits and adjusted to respond to signaling energy over difl'erentfrequency ranges, a binaural telephone system including a pair of independent telephone receivers with one of said telephone receivers connected with one of said receiving circuits and the other of said telephone receivers connected to the other of said receiving circuits, and a generator of high frequency oscillations arranged to act upon both of said radio receiving circuits for efi'ecting an indication in said telephone receivers dependent upon the frequency of incoming signaling energy over a range of frequencies corresponding to the aggregate frequency range of said radio receiving circuits.

5. In a radio receiving system a pair of independent antenna circuits, a radio receiving circuit coupled with'each of said antenna circuits, an electron tube system connected with each of said receiving circuits and arranged to regeneratively amplify the incoming signaling energy over difierent ranges of frequencies, a generator of high frequency energy coupled with each of said electron tube systems and a binaural telephone circuit comprising a headset having separate telephone receivers with one receiver connected to one of said electron tube systems and the other receiver connected with the other of said electron tube systems for effecting an indication of the incoming signaling energy independent of the effects of fading.

ALBERT H. TAYLOR. 

